Messages are sent over a communications channel using two different signals. One signal requires 2 microseconds for transmittal, and the other signal requires 3 microseconds for transmittal. Each signal of a message is followed immediately by the next signal. Seç.. The recurrence relation for "the number of different signals that can be sent in "n" microseconds" is: Using the iterative method (you compute each step by hand) calculate how many different messages Seç. can be sent in 7 microseconds? (take the initial conditions of the recurrence relation as: So = 1 and S1 = 1, S2 = 1)

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